The nearest railway station from which you can reach the Tisovec base is Skole.
In Skole, trains depart from many cities, including Lviv and Kiev, Odessa and Kharkov. The schedule is available on the website of UkrainanRailways
Also you have the opportunity to book a transfer directly to the festival site and back. Festival buses will go on the route Skole-Tysovets-Skole and Lviv-Tysovets-Lviv only by pre-order. Order a transfer on the spot will not work!
There are regular buses from the Lviv railway station, and from Skole you can book a taxi. At the beginning of summer, the estimated cost of a taxi ride from Skole to the base is 300 UAH per car.